Abstract
Mass transfer of organic compounds through aqueous and non-aqueous liquid surfactant membranes was studied in a single-drop extraction colum and in a multi-emulsion. In the case of single-drop membrane permeation of n-hexane/benzene mixtures, the mass transfer rate, membrane thickness, membrane stability, and membrane selectivity, depended on the viscosity, the concentration of the surfactant laurylpyridiniumchloride (LPC), and the ionic strength of the aqueous membrane. Benzene transport selectivities of up to 7.5 were observed. p]Up to 95% removal of phenol from a diluted aqueous phase could be achieved within 20 minutes by means of a silicone membrane in a multi-emulsion. The stripping agent was 0.1 N NaOH. p]The performances of aqueous and non-aqueous liquid membranes are compared from estimates of the corresponding mass-transfer coefficients.
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